Toothbrush



FIG. 1 is a front elevational view of a toothbrush, showing my new design;

FIG. 2 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is an end elevation view taken from the brush end thereof; and

FIG. 5 is an end elevation view thereof taken from the opposite end. 

The ornamental design for a toothbrush, substantially as shown and described. 